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首页> 外文期刊>Nature Climate Change >Sea-level-rise-induced threats depend on of tide-influenced estuaries worldide
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Sea-level-rise-induced threats depend on of tide-influenced estuaries worldide

机译：Sea-level-rise-induced威胁的依赖tide-influenced河口worldide

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摘要

The effects of sea-level rise on the future morphological functioning of estuaries are largely unknown because tidal amplitudes will change due to combined deepening of the estuary mouth and shifting amphidromic points at sea. Fluvial sediment supplyis also globally decreasing, which hampers infilling necessary to maintain elevation relative to sea level. Here we model 36 estuaries worldwide with varying sizes, shapes and hydrodynamic characteristics, and find that small shallow estuaries and largedeep estuaries respond in opposite ways to sea-level rise. Large estuaries are threatened by sediment starvation and therefore loss of intertidal area, particularly if tidal amplitude decreases at the mouth. In contrast, small estuaries face enhanced flood risks and are more sensitive to tidal amplification on sea-level-rise-induced deepening. Estuary widening can partly mitigate adverse effects. In large estuaries, expanded intertidal areas increase tidal prism and available erodible sediment for adaptation, whereas it slightly reduces tidal amplification in small estuaries.
机译：对未来海平面上升的影响形态功能的河口不太为人所知,因为潮汐振幅由于河口的综合深化变化嘴和转移无潮点在海上。河流沉积物supplyis也在全球范围内减少,这妨碍了填入必要保持高度相对海平面。36河口模型在世界范围内不同尺寸,形状和水动力特征和发现小浅河口和largedeep河口相反的方式应对海平面上升。饥饿,因此损失的潮间带区域,特别是如果潮汐振幅降低的的嘴。洪水风险和对潮汐更敏感在sea-level-rise-induced放大深化。不利影响。潮间带地区潮汐棱镜和增加为适应受侵蚀的沉积物,可用而稍微降低了潮汐放大在小河口。

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